linux-kernel - Re: [PATCH 05/10] ldisc: new dcd_change() method for line disciplines.

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Date:	Tue, 19 Aug 2008 22:53:22 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Rodolfo Giometti <giometti@...ux.it>
Cc:	linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	David Woodhouse <dwmw2@...radead.org>,
	Dave Jones <davej@...hat.com>, Sam Ravnborg <sam@...nborg.org>,
	Greg KH <greg@...ah.com>,
	Randy Dunlap <randy.dunlap@...cle.com>,
	Kay Sievers <kay.sievers@...y.org>,
	Rodolfo Giometti <giometti@...ux.it>
Subject: Re: [PATCH 05/10] ldisc: new dcd_change() method for line
 disciplines.

> + * void (*dcd_change)(struct uart_port *port, unsigned int status,
> + * 			struct timespec *ts)
> + *
> + *	Tells the discipline that the DCD pin has changed its status and
> + *	the relative timestamp. Pointer ts can be NULL.
>   */

uart_port is a specific property of a few random types of interface, pass
a tty struct up. Otherwise looks fine. Might one day expand it to a more
generic change type and pass info on what changed but thats a future
mystery.
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